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Driving a step change in the treatment of cancer.

The world leader in CTPS1 inhibition for the targeted treatment of cancer.


Dencatistat, a novel drug with the potential to yield a highly selective, safe and effective cancer treatment for both blood cancers and solid tumours.

Our lead asset, dencatistat (STP938), is a first in class, highly selective is a first-in-class, highly selective, orally bioavailable, targeted oncology therapy that aims to become a key drug for a multitude of cancer treatment regimens.

Current Blood Cancer Treatment


Every 3 minutes someone is diagnosed with leukemia, lymphoma or myeloma in the US


There are over a hundred different types of blood cancer


No improvement in 5-year survival rates for peripheral T cell lymphoma patients in the past 20 years

Current Solid Tumour Treatment


2.5 million people diagnosed with advanced cancer every year in Europe and the US


Average survival for those diagnosed with advanced cancer is 1-2 years


Approximately 10% of all cancers have lost CTPS2 expression and may benefit from selective CTPS1 inhibition

Watch the leadership team discuss our lead CTPS1 inhibitor STP938

Dencatistat (STP938) is entering clinical trials for the treatment of blood cancers with the potential for accelerated approval from a single arm Phase II study.

Dencatistat (STP938)

Our lead CTPS1 inhibitor dencatistat has the potential to become a key treatment for a multitude of cancers. Dencatistat is in clinical development for the treatment of blood cancers, with the potential for accelerated approval from a single arm phase 2 study.
Dencatistat is also in clinical development for solid tumours with the initial focus on ovarian cancer. In the future dencatistat could also form the backbone of various treatment regimens for solid tumours.

About Us

Learn more about us and our people.


Learn more about our lead CTPS1 Inhibitor.

Therapeutic Areas

Learn more about our therapeutic areas.


Learn more about our research and clinical trials.

Step Pharma
15 rue Louis et Auguste Lumière
Technoparc du Pays-de-Gex
01630 Saint-Genis-Pouilly